Grinding machine



Aug. 9,1927.

F E. GARDNER GRINDING MACHINE Original Filed May 27, 1921 2 Sheets-Sheetl Aug. 9 1927.

F. E. GARDNER GRINDNG MACHINE 2 Sheets-SheetZ Original Filed May 27, 1921 I: 1 4. E5 v Patented Aug. 9, 1927.

UNITED. STATES;

'- rnnnmuc n. GARDNER, OF BnLoInwIsconsnv.

GRINDING MACHINE.

Original application filed May 27, 1921,

This invention, relatesto improvements in mountings for tool spindles, and has p ar-. ticular reference to spindles for supportingdisk grinders. The present application is a division of my copending application Serial No. 472,977, filed May27, 1921. j The invention is particularlyadapted for use in double disk grinders inwhich two grinding wheels or disks are arranged in opposed relation with the spindles co-axial or parallel. lVork is fed between the two parallel grinding facesof the wheels to grind the same simultaneously on opposite sides in parallel planes. i I A' general objectof the invention is to provide means for universally adjusting the axis of one of the grinding Wheels to position the faces .of the, two wheels in exact parallelism. here but one grinding wheel is provided the adjustment is available to bring the face of said wheel into a predetermined or desired plane.

, This object and other objects, which will become apparent as the description proceeds, are attained in the machine shownin the accompanying drawings, but I would have it understood that this particular machine represents only one ofgmany possible embodiments of my invention, and that while I have shown and will hereinafter describe the said particularembodiment in detailfor the sake of lucidity, I do not intend to limit the in vention to the construction disclosed but aim to cover in the appended claims all modifications and equivalents falling within the scope of my invention as determined by the state of the priorart. In the accompanyi :g drawings, Figure 1 is a side elevational view of a grinding machine embodying my invention. p Fig. 2 is a fragmentary sectional view taken along line 22 of Figure 1. I

Fig. 3 is a fragmentary vertical sectional view of the adjustable mounting for one of the grinding spindles. j

Figs. 4 and 5 are elevational views partially in section of the. right and left ends respectively of the mounting shown in Fig. 3. Fig. 6 is a plan view of a support forming part of said mounting.

Serial 110,472,977. Divided and this application filed July 20, 1925. Serial No.-44,729.

In the grinding machine disclosed in the parent application, two main carriages are arranged in offset relation on a main bed or base. In these carriages are rotatably mountedtwo spindles on the, adjacent ends of which are fixedgrinding wheels or disks. These grinding wheels preferably are of the so called ring wheel type, and areal-ranged with their adjacent edges overlapping to the extent of their radial dimensions. Between the opposed faces of the grinding wheels is a carrier preferably in the form of a rotary disk, having receptacles to carry pieces of work into the space between the grinding wheels. One of the carriagesis mounted to reciprocateaxially of the spindle thereby to move its grinding wheel-toward-andaway from the carrier to facilitate the introduction of work between the wheels. Automatic means is provided for reciprocating this grinding wheel, and for moving the work carrier in timed relation thereto so that when the wheels are separated a piece of work may be interposed between the two grinding faces. J r qMeans is provided for universally adjusting the axis of the other or stationarily mounted grinding wheel to, effect parallelism between the grinding faces of the wheels, whichadjusting mechanism comprises means for moving the bearings for grinding wheel spindle about a horizontal and a'vertieal axis independentl Referring to Figure'lof the drawings, a suitable base 10 carries on its opposite ends two carriages l1 and 12 having bearings in which two spindles 13 andlt are mounted, said spindles having fixed totheir adjacent ends two grinding wheels which are indicated as a whole by numerals 15 and 16. The spindles have pulleys 17 and 18 fixed thereon by which they may be driven from any suitable source of power. The axes of the two spindles 13 and 14 are parallel, but-are offset or arranged out of alinement with each other, both axes being in the present instance in the same horizontalplane. i

Between the wheels 15 and 16 there is mounted a rotatablework carrier 19 adapted thickness. The carriage is then drawn back again and the finished piece of work is dis= charged. The means for automatically operating the work carrier and reciprocating the movable carriage 11 forms no part of the present invention and is disclosed in the above-mentioned parent application.

Means is provided for obtaining perfect alinement or parallelism of the axes of the two grinding wheels by adjustment of the second carriage 12. A knee 21 is journaled on a horizontal axis at 22 on the base 10 of the machine. This knee is supported at its outer end by a pair of jack screws 23 secured by locknuts, and is clamped by a bolt 24 which passes through upstanding lugs 25 on the base 10 and through elongated holes 26 in the overlapping sides of the knee. A sub-base 27 is supported upon the knee 21 to swing about a pivot 28 located at one end of the knee and sub-base, and the sub-base is adapted to be clamped in position on the knee by four bolts 29 passing through enlarged or elongated openings 30 in the subbase and threaded into the knee. When there bolts are loosened, the sub-base 27 may le swung on the vertical axis of the pivot 28, and by tightening the bolts the subbase may be locked in its set position. Suitable upstanding lugs 31 at opposite sides of the knee 21 carry adjusting bolts 32 by means of which the sub-base may be conveniently and accurately adjusted. It will thus be seen that the two adjustments about the pivotal axes 22 and 28 provide for perfect alinement or parallelism of the faces of the two grinding elements 15 and 16.

For adjusting the grinding element 16 with respect to the work, thecarriage 12 is slidably mounted with respect to its subbase 27 on guides 33. The means herein shown for making this adjustment comprises a combined nut and worm wheel 34, the periphery of which meshes with a worm 35, the nut being positioned between opposed walls or lugs on the carriage and receiving a screw shaft 36. This shaft is rotatably mounted in a lug 37 on the sub-base 27, and has collars 38 to prevent endwis e movement thereof.

For quick adjustment of the grinding element toward and away from the work, the shaft 36 is rotated within the worm wheel 34 by means of a suitable crank handle (not against longitudinal movement by said lug,v

said shaft being provided with a hand wheel 42 by means of which the worm 35 may be rotated.

I By virtue of the various adjustments provided for the carriage 12 supporting the grinding wheel structure, the faces of the two grinding wheel elements can be accu rately' kept in parallel planes so that accurate grinding will result. w

I claim asmy invention 1. A grinding machine having, in combination, a main base, a support pivotally mounted thereon to swing in one direction, means fonadjustably fixing said support in different positions, a second support pivotally mounted on the first support for adjustment' in a difierent direction, means for adjusting the second support into different positions with relation to the first support, a carriage slidable on the second support, and a rotary grinding element mounted on said carriage. i

2. A grinding machine having, in combination', two opposed rinding elements, means for feeding one of said grinding elements toward and away from the other, and means for adjusting the other grinding element into correct relative position with re-. spect to said first-mentioned grinding elenient by pivotal adjustment independently around a horizontal and around a vertical axis.

3. In a grinding machine, in combination with an automatically reciprocable grinding element, a second grinding element opposed to said reciprocable element, and means for adjusting said. last-mentioned grinding element into perfect alinement with respect to said reciprocable element by ad justment independently around each of two perpendicular"axes. V V l 4. In a grinding machine of the class described, the combination of a base, a support' hinged at one end to said base to swing vertically, a guide frame mounted on said support to be'swung laterally, a carriage shiftable on said frame, a shaft journaled in said carriage, and a grinding wheel on said shaft. 5 i

5. In a grinding machine of the class described, the combination of two shafts, a grinding wheel at the end of'each shaft with thewheels opposed to each other, means for adjusting one of said shafts vertical swing thereof, and means for adjusting said lUU shaft by horizontal swing thereof whereby said wheels may be relatively alined.

6. In a grinding machine of the class described, the combination of two shafts, a grinding wheel at the end of each shaft with the wheels opposed to each other,

means for adjusting one of said shafts by Vertical swing thereof, means for adjusting said shaft by horizontal swing thereof, to relatively position said wheels, and means for shifting said shafts longitudinally.

In testimony whereof, I have hereunto affixed my signature.

FREDERIC E. GARDNER. 

